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[uh-stron-uh-mer] /əˈstrɒn ə mər/
an expert in astronomy; a scientific observer of the celestial bodies.
Origin of astronomer
Middle English word dating back to 1325-75; See origin at astronomy, -er1 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for astronomer
Contemporary Examples
Historical Examples
  • It couldn't be at the stars; such a desperado was neither astrologer nor astronomer.

  • I had a hunch, and this astronomer chap has proved it correct with his mathematics.

  • "Come outside; I believe I can show you," an astronomer said.

    The Leech Phillips Barbee
  • The eighth picture depicted an astronomer who has not yet come into existence.

    Great Astronomers R. S. Ball
  • The letters prescribe the various duties of the astronomer and the mode of his election.

    Great Astronomers R. S. Ball
  • For two seasons in 1865 and 1866 I had the honour of being Lord Rosse's astronomer.

    Great Astronomers R. S. Ball
British Dictionary definitions for astronomer


a scientist who studies astronomy
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for astronomer

late 14c., from astronomy (q.v.), replacing French import astronomyen (c.1300), which, had it survived, probably would have yielded *astronomian. Still in Shakespeare used in places where we would write astrologer.

Online Etymology Dictionary, © 2010 Douglas Harper
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